Dispenser

Abstract: The present invention relates to a dispenser for feeding out convenient units of two liquid products, said dispenser (1) being preferably intended for manual handling and manual feed-out of viscous products such as mustard (2) and ketchup (3) or similar sauces on food products such as hamburger bread rolls (4) or the like. To bring about an essential reduction of the time earlier required for feeding out convenient units of the two liquid products (2, 3) the dispenser (1) comprises a first container (5) holding one liquid product (3) and a second container (15) positioned within the first container and holding the other liquid product (2), a pump assembly (18) being adapted to feed out convenient units of the two liquid products (2, 3) from their respective containers (5, 15) simultaneously.

Description: This invention relates to a dispenser for dispensing convenient units of two liquid products (see e.g. DE-A-4 113 825). The dispenser is preferably intended for manually handling and manually feeding out viscous products such as mustard and ketchup or similar sauces on food products such as hamburger bread rolls or the like. Hamburgers are usually served with mustard and ketchup which are dispensed separately on the hamburger bread rolls from different containers. Such a dispensing procedure takes a rather long time, which manifests itself particularly when many hamburgers have to be served in a short period of time. Besides, a rather comprehensive equipment is required to carry out said dispensing procedure. The aim of the present invention is to improve a dispenser of the above-mentioned type so that dispensing time is reduced considerably and a dispenser of simple and easy-to-clean design is obtained. According to the invention, this is accomplished by providing a dispenser that presents the features defined in claim 1. By reason of the fact that one container that holds one of the two products to be dispensed is arranged within the other container that holds the other of the two products, there is realised a compact and readily handled dispensing unit, and by causing the pump assembly to feed out convenient units of the two products simultaneously dispensing time is essentially reduced. The invention is elucidated more in detail in the following with reference to the accompanying drawings in which: Figure 1 is a vertical section of a dispenser according to the invention; Figure 2 is a vertical section of lower parts of the dispenser shown in Figure 1 during a dispensing operation; Figure 3 is a vertical section of lower parts of the dispenser shown in Figure 1 during a return stroke; Figure 4 is a plan view of the containers comprised in the dispenser according to the invention; Figure 5 is a section of a sealing ring comprised in the dispenser shown in Figure 1; Figure 6 is a view of an end portion of the dispenser shown in Figure 1, in which portion discharge openings are provided; Figure 7 is a diagrammatic view of a filling device. The dispenser 1 illustrated in the drawings is preferably intended to feed out convenient units of mustard 2 and ketchup 3 on a hamburger bread roll 4. The dispenser 1 has a first container 5, preferably of transparent material, which comprises an upper part 6 with a handle 7, and a lid 8 mounted so as to permit being swung about an axis 9 for opening of the first container 5. Said first container 5 merges at its lower end via a tapering member 10 into a discharge member 11 which in its outer end wall 12 is provided with discharge openings 13 for mustard 2 and discharge openings 14 for ketchup 3. The dispenser 1 further has a second container 15, preferably of transparent material. Said second container 15 is lowerable into the first container 5 and, in the lowered position, vertically movable in relation to the first container 5. The movements of the second container 15 with respect to the first container 5 are guided preferably by guide blades 16 provided at the top of the second container 15 and engaged between guide flanges 17 provided at the top of the first container 5. The dispenser 1 comprises a pump assembly 18 for feeding out convenient units of mustard 2 from the second container 15 and, at the same time, of ketchup 3 from the first container 5. To bring about said feed-out of mustard 2 and ketchup 3 simultaneously the second container 15 is arranged and/or formed as a piston device 19 comprised in the pump assembly 18, which can be caused to effect dispensing movements (in the direction of the arrow P in Figure 1) for said feed-out. The piston device 19 formed by the second container 15 presents a valve seat 20 against which an outer sealing ring 21 is adapted to bear. The second container 15 further presents an inner piston 22 which extends downwardly and at its lower end has an enlarged end portion 23. The inner piston 22 has a throughflow passage 24 which is connected via a longitudinal branch at the upper end to the interior of the second container 15 and which via a transverse branch at the lower end opens into lateral surfaces 25 of the enlarged end portion 23. The inner piston 22 projects from above into a valve housing 26 of elastic material so that its enlarged end portion 23 is situated within said valve housing and movable in an upper throughflow chamber 27 in the valve housing 26 and in a lower feed-out chamber 28 connecting thereonto in the valve housing 26. The throughflow chamber 27 has a slightly larger diameter than the enlarged end portion 23 so that mustard 2 can flow from the interior of the second container 15 via the throughflow passage 24 and via a throughflow gap 29 formed by throughflow chamber 27 down into the feed-out chamber 28. The feed-out chamber 28, however, has the same diameter as or a slightly smaller diameter than the diameter of the enlarged end portion 23 of the inner piston 22. This implies that the enlarged end portion 23 and the valve housing 26 will tightly bear against one another when the enlarged end portion 23 during its feed-out movement P is pushed down into the feed-out chamber 28, and the valve housing 26 will then also close the mouths of the throughflow passage 24. By reason of the seal arising between the enlarged end portion 23 and the valve housing 26 when the enlarged end portion 23 performs its feed-out movement P in the feed-out chamber 28 the mustard 2 contained in the feed-out chamber 28 will be pressed out of said chamber. At this feed-out mustard 2 will be pressed against the check valve 30 so that said valve opens, whereupon mustard 2 will be forced out through the discharge openings 13 onto the hamburger bread roll 4. At the feed-out movements P of the piston device 19 the outer sealing ring 22 will be moved down into the discharge member 11, the sealing ring 21 being pressed against its valve seat 20 while sliding with established sealing effect against the inner side of the discharge member 11. As a result, the connection between an outer dispensing chamber 31 and the upper portions of the first container 5 is closed. Ketchup 3 contained in the outer dispensing chamber 31 will thus be fed out of the dispensing chamber 31 with the aid of the outer sealing ring 21. During this feed-out the ketchup 3 will be pressed against an outer check valve 32 so that said valve opens and allows ketchup to reach the discharge openings 14 through which it is fed out in convenient units on the hamburger bread roll 4 (see Figure 2). The feed-out movements P of the piston device 19 take place against the action of a return means 33 to which returning forces are imparted as it is actuated when the piston device 19 is subjected to feed-out movements P. When the piston device 19 is released after feed-out of mustard 2 and ketchup 3 has been effected, the return means 33 imparts return movements R to the piston device 19. As a result, the inner piston 22 moves out of the feed-out chamber 28 of the valve housing 26, which implies that the check valve 30 is brought into closing position and that there arises a pressure below atmospheric in the feed-out chamber 28 since the enlarged end portion 23 slides against the valve housing 26 under established seal. This pressure below atmospheric in the feed-out chamber 28 results in mustard 2 being sucked into said feed-out chamber 28 when the enlarged end portion 23 has moved so far out of the feed-out chamber 28 that the mouths of the throughflow passages 24 are not obstructed any more by the valve housing 26. Thus, mustard 2 will be sucked from the upper parts of the second container 15, through the throughflow passage 24 and the throughflow gap 29 formed in the throughflow chamber 27 around the enlarged end portion 23 and down into the feed-out chamber 28 until the latter is filled with mustard 2 for the next dispensing operation. Simultaneously as the feed-out chamber 28 is filled with mustard 2 when return movements in direction R are imparted to the piston device 19, the outer dispensing chamber 31 is filled with ketchup 3. This is brought about by the outer check valve 32 returning to closed position when the pressure against it ceases and by the outer sealing ring 21 at its upward movement against the ketchup 3 above it being caused by the ketchup pressure to fold downwards, thereby leaving its valve seat 20 and/or its contact with the inner side of the discharge member 11. As the outer sealing ring 21 takes this shape, ketchup 3 from the upper parts of the first container 15 flows via openings 34 in the outer sealing ring 21 and/or via the gap arising between the outer sealing ring 21 and the inner side of the discharge member 11 down into the outer dispensing chamber 31. The outer sealing ring 21 furthermore may be so arranged that there is formed a gap 35 between it and the inner side of the first container 5 when the second container 15 occupies its upper position. This will permit ketchup 3 to flow down into the outer dispensing chamber 31 after the second container 15 has occupied an upper position. The outer sealing ring 21 is preferably formed in such a way and consists of, or is provided with, such an elastic material that it can be passed over the enlarged end portion 23 of the inner piston 22. The outer sealing ring 21 may furthermore be moved along the inner piston 22 until it abuts against the valve seat 20, and it functions as a check valve at the feed-out and during the return movements R. The return means 33 preferably is a prestressed coil spring which is passed onto the inner piston 22 so that the upper end of the coil spring bears against such inner parts of the outer sealing ring 21 that are supported by lower parts of the second container 15. The coil spring bears with its lower end against such parts of the valve housing 26 that are supported by lower parts of the first container 5. So positioned, the coil spring will be compressed when the second container 15 is urged downwards in order to perform feed-out movements P. Said feed-out movements P may be restricted with the aid of at least one such abutment surface 37 of the second container 15 that abuts against lower parts of the tapering member 10 of the first container 5. For the fixation of the valve housing 26 and the return means 33 of the inner piston 22, the valve housing 26 comprises an elastic material or consists, preferably in its entirety, of elastic material and has a perforated end wall 36 which can be caused to snap in behind the enlarged end portion 23 of the inner piston 22. Furthermore, said end wall 36 is so shaped that it permits sliding on the inner piston 22 above the enlarged end portion 23 thereof and preferably it is also of such a shape that it is capable of retaining both the valve housing 26 and the return means 33 to the inner piston 22. Besides, the end wall 36 bears against the inner piston 22 with such sealing effect that air cannot pass between said parts. The check valves 30 and the outer check valves 32 suitably include parts of elastic material that are comprised in the valve housing 26 and extend downwardly from said housing. Furthermore, said parts are preferably of such a shape that they bear, in closed positions, against the inside of the discharge member 11 of the first container 5 and, in opened positions, are folded inwardly from said inside. The above-described dispenser 1 can readily be manually assembled and disassembled without the use of tools. For disassembly of the dispenser 1 the lid 8 is opened and the second container 15 is withdrawn in an upward direction from the first container 5. Then the valve housing 26 can be pulled free from the inner piston 22 and as a result the return means 33 is uncovered for removal from the inner piston 22. Finally, the outer sealing ring 21 also can be removed from the inner piston 22, which implies that the dispenser 1 comprises only five readily detachable parts which are easily cleaned, for instance by flushing, after a day's use. Said five parts are as easily assembled in the reverse order. As will appear from the drawings, the lid 8 may function as the pump handle of the pump assembly 18. The pump handle may present a downwardly directed abutment 38 by which the lid 8 bears against the upper edge of the second container 15 which serves as a piston assembly 19. The lid 8 may be so dimensioned and/or arranged that it restricts the return movements R of the second container 15 in an upward direction, or the first container 5 may present some other part that brings about said restriction of movement. As will also appear from the drawings, the dispenser 1 permits feeding out predetermined units of both mustard 2 and ketchup 3, and feed-out can be effected with exactly predetermined quantitative relations of mustard 2 to ketchup 3. Besides, the feed-out chamber 28 for mustard 2 is considerably smaller than the outer dispensing chamber 31 for ketchup 3, which implies that at each pump stroke there is fed out a much smaller unit of mustard 2 than of ketchup 3. In the outer end wall 12 there may be provided for instance four discharge openings 13 for mustard 2 spaced equal distances apart on a circle and for instance eight discharge openings 14 for ketchup 3 spaced equal distances apart on a larger circle having approximately the same centre (see Figure 6). The dispenser 1 preferably is in the form of a hand-held dispensing tool which can be held by the handle 7 with one hand. With the thumb of the same hand dispensing can be brought about by exerting a downward pressure on e.g. a projecting portion 40 of the lid 8. With the other hand the first container 5 can be held firmly, preferably by grasping the part of the container 5 opposite to the handle 7. Holding the dispenser 1 in this way, it can be easily and rapidly moved from one place to another and thus be kept in a suitable position with respect to the hamburger bread rolls 4 to which mustard 2 and ketchup 3 is to be supplied. In the dispenser 1 described above and illustrated in the drawings, the pump assembly 18 comprises a piston assembly 19 consisting of the second container 15 and parts arranged thereon. Other parts of the dispenser 1 illustrated may be given other designs - this applies for example to the outer sealing ring 21 which may be designed as another sealing means. Other parts also, such as the inner piston 22, the valve housing 26, the check valves 30, 32 and the return means 33 may be given other designs, however with retained functions. The liquid products may be liquid foodstuffs other than mustard and ketchup, preferably viscous foodstuffs, and these liquid products may be adapted for dispensing onto products other than hamburger bread rolls, e.g. other food products. For filling the two liquid products 2, 3 into the dispenser 1 use is suitably made of a filling device 41 (see Figure 7). This device comprises a pressure container 42 in which a pressure above atmospheric can be generated with the aid of a pressure source 43 connected thereto. The pressure container 42 is designed in such a way that two storage receptacles 44, 45 can be placed therein, viz. a storage receptacle 44 containing one liquid product 2 and another storage receptacle 45 containing the other liquid product 3. Conduits 46, 47 are provided to conduct the liquid products 2, 3 contained in their respective storage receptacles 44, 45 out of the pressure container 42. As the two storage receptacles 44, 45 consist of such a flexible material that they can be caused to shrink with the aid of a pressure above atmospheric in the pressure container 42 the products 2, 3 can be forced out of the storage receptacles 44, 45 through the conduits 46, 47. The conduits 46, 47 cooperate with a valve mechanism 48 that can be set for closing or opening the conduits 46, 47 so that the liquid products 2, 3 are either prevented from being fed out of their storage receptacles 44, 45 or are fed out of them when they are to be filled into the dispenser 1. Each storage receptacle 44, 45 can be of the fully closed type that on the inside of its wall material has a holder 49. Each conduit 46, 47 may present a discharge nozzle 50 fitting the holders 49. Each storage receptacle 44, 45 can be opened for emptying of the product contained therein in that the discharge nozzle 50 is forced through the container wall material and into the holder 49 so that the discharge nozzle 50 fixedly adheres to the holder 49, connecting on to the wall material in an air-tight manner. By this arrangement the storage receptacles 44, 45 can rapidly be opened by means of the conduits 46, 47 for emptying the products 2, 3 contained in said receptacles and at the same time the conduits 46, 47 can be rapidly and fixedly connected to said receptacles. Coupling of the respective conduit 46 and 47, respectively, to the respective storage receptacle 44, 45 can be effected when the storage receptacles 44, 45 are outside of the pressure container 42 (a pressure container is shown in such a position by dash and dot lines in Figure 7). The conduits 46, 47 are arranged in such a manner on the pressure container 42 that they permit placing the storage receptacles 44, 45 within the pressure container 42. The conduits 46, 47 are preferably passed through holes in the sides of the pressure container 42 so that they permit being removed from the pressure container 42 for cleaning purposes. The conduits 46, 47 may possibly be drawn into the pressure container 42 via sealing plugs 51. The conduits 46, 47 may also be detachable from the valve mechanism 48 so that they can be altogether released for cleaning purposes. For filling mustard 2 and ketchup 3 into the dispenser 1 the mouth of the conduit 46 is placed in the first container 5 and the mouth of the conduit 47 in the second container 15.

Claims: A dispenser for dispensing convenient units of two liquid products, said dispenser (1) being preferably intended for manually dispensing viscous products such as mustard (2) and ketchup (3) or similar sauces preferably on food products such as hamburger bread rolls (4) or the like, said dispenser comprising a first container (5) for holding the first liquid product (3) and a second container (15) arranged within the first container (5) for holding the second liquid product (2), wherein the second container (15) is part of a piston assembly (19) in a pump assembly (18), the piston assembly (19) being movably mounted in the first container (5) providing a feed-out movement (P) for feeding convenient units of the two liquid products (2, 3) out of the first and second container (5, 15), characterized in that the piston assembly (19) effects said feed-out movement (P) by being urged towards at least one return means (33) for feeding out said two liquid products (2, 3) through discharge openings (13, 14) in the dispenser (1), that the piston assembly (19) comprises at least one outer sealing means (21) under tight application against the first container (5) forcing the first liquid product (3) collected in an outer dispensing chamber (31) in the first container (5) through at least one discharge opening (14), that the piston assembly (19) also comprises at least one inner piston (22) under tight application against a wall of a valve housing (26) forcing the second liquid product (2) collected in a feed-out chamber (28) in the valve housing (26) through at least one discharge opening (13), that said outer sealing means (21) of the piston assembly (19) during return movements (R) of the piston assembly (19) in a direction opposite to its feed-out movements (P) admits units of the first liquid product (3) to the dispensing chamber (31) of the first container (5), and that said inner piston (22) and/or the valve housing (26) during said return movements (R) admits units of the second liquid product (2) to the feed-out chamber (28) in the valve housing (26). A dispenser as claimed in claim 1, characterized in that said outer sealing means (21) during feed-out movements (P) of the piston assembly (19) bears against a valve seat (20) on the piston assembly (19) and sealingly slides along an inner side of the first container (5) so that the outer sealing means (21) closes a connection between the feed-out chamber (28) of the first container (5) and the other parts of the first container (5), and that said outer sealing means (21) during the return movements (R) of the piston assembly (19) forms a shape with respect to the inner side of the first container (5) and/or the valve seat (20) to create a connection between the outer dispensing chamber of the first container (5) and the other parts of the first container (5) and/or that the outer sealing means (21) in an upper position adjusts itself relative to the inner side of the first container (5) such that a gap (35) between the outer sealing means (21) and said inner side is formed, whereby units of the first liquid product (3) can flow from the first container (5) into the outer dispensing chamber (31) thereof. A dispenser as claimed in claim 1 or 2, characterized in that the valve housing (26) and/or the inner piston (22) is or are adapted or arranged so that during return movements (R) of the piston assembly (19) a pressure below atmospheric is created in the feed-out chamber (28) of the valve housing (26) such that units of the second liquid product (2) are sucked into the feed-out chamber (28) of the valve housing (26) from the second container (15). A dispenser as claimed in one of the preceding claims, characterized in that the valve housing (26) comprises a throughflow chamber (27) in which the inner piston (22) is adjustable in such a manner that units of the second liquid product (2) in the second container (15) can pass through at least one throughflow passage (24) in the inner piston (22), from the second container (15) to the feed-out chamber (28) of the valve housing (26), that the inner piston (22) moves into the feed-out chamber (28) in the valve housing (26) such that the part of the inner piston (22) is situated in the feed-out chamber (28) against the valve housing (26) under a seal so that the throughflow passage (24) of the inner piston (22) and then the inner piston (22) feeds out convenient units of the second liquid product (2) contained in the feed-out chamber (28) from said chamber during feed-out movements (P) and moreover the inner piston (22) provides a pressure below atmospheric in the feed-out chamber (28) during return movements (R) of the piston assembly (19) so that units of the second liquid product (2) contained in the second container (15) are sucked into the feed-out chamber (28) through the throughflow chamber (27) when the part of the inner piston (22) bearing against the valve housing (26) leaves the feed-out chamber (28). A dispenser as claimed in one of the preceding claims, characterized in that the valve housing (26) consists of an elastic material arranged on the inner piston (22) to form a perforated end wall (36) of the valve housing (26) to snap in behind an enlarged end portion (23) of the inner piston (22), and that the end wall (36) is preferably shaped so as to permit the valve housing (26) to retain a return means (33) having a top directly or indirectly applied against the second container (15) and a bottom supported, directly or via parts of the valve housing (26) by lower parts of the first container (5). A dispenser as claimed in one of the preceding claims, characterized in that check valves (30, 32), preferably comprised in the valve housing (26), permit feeding out convenient units of said liquid products (2, 3) through discharge openings (13, 14) during feed-out movements (P) of the piston assembly (19), said check valves (30, 32) prevent admission of air through the discharge openings (13, 14) to feed-out and dispensing chamber (28, 31) for the liquid products (2, 3) during return movements (R) of the piston assembly (19). A dispenser as claimed in one of the preceding claims, characterized in that the return means (33) is a coil spring mounted between a lower part of the first container (5) and a lower part of the second container (15) in such a manner that said coil spring is compressed against the spring action thereof when the first container (5) is caused to effect feed-out movements (P), said coil spring imparting return movements (R) to the second container (15) when a feed-out of the liquid products (2, 3) has been accomplished. A dispenser as claimed in one of the preceding claims, characterized in that the second container (15) is withdrawably disposed in the first container (5) and that the outer sealing means (21), the valve housing (26) and the return means (33) are withdrawable. A dispenser as claimed in one of the preceding claims, characterized in that the first and second containers (5, 15), the outer sealing means (21), the valve housing (26) and the return means (33) permit separation from one another without the use of tools and clean-flushing in a disassembled state and reassembly without the use of tools. A dispenser as claimed in one of the preceding claims, characterized in that the first container (5) has a pump handle preferably in the form of a lid (8) which is part of the first container (5) and hinged to said container, said pump handle is designed for manual operation by pressure so as to subject the second container (15) to feed-out movements (P) in downward direction with respect to the first container (5). A dispenser as claimed in one of the preceding claims, characterized in that the dispenser is a hand-held dispensing tool to allow the dispenser to be held in one hand or two hands above feed-out points at the feeding-out of convenient units of the two liquid products (2, 3) simultaneously and moved between said feed-out points, and that the pump assembly (18) is manually operable for feeding out convenient units of the two liquid products (2, 3) simultaneously when the hand-held dispensing tool is held above said feed-out points. A dispenser as claimed in one of the preceding claims, characterized in that the pump assembly (18) during each feed-out movement (P) feeds out predetermined units of the two liquid products (2, 3) in a predetermined quantitative relation between the liquid products (2, 3) from their respective container (5, 15), i.e. a considerably greater quantity of the first liquid product (3) from the first container (5) than of the second liquid product (2) from the second container (15). A dispenser as claimed in one of the preceding claims, characterized in that the pump assembly (18) feeds out the second liquid product (2) via at least one opening, preferably several openings (13), and the first liquid product (3) via at least another opening, preferably several other openings (14), said openings (13, 14) preferably being so arranged that a plurality of openings (14) for the first liquid product (3) to be fed out in a larger quantity surround at least one opening (13) for the second liquid product (2) to be simultaneously fed out in a smaller quantity. A dispenser as claimed in one of the preceding claims, characterized in that the dispenser also comprises a filling device (41) to fill liquid products (2, 3) into both the first and the second container (5 and 15), said filling device (41) comprising a pressure container (42) in which a pressure above atmospheric can be generated, that the pressure container (42) is in such a form as to simultaneously hold a first storage receptacle (44) for the second liquid product (2) and a second storage receptacle (45) for the first liquid product (3), conduits (46, 47) being provided to pass said liquid products (2, 3) from the respective storage receptacles (44, 45) placed in the pressure container (42) out of said pressure container (42), such that the storage receptacles (44, 45) comprises a flexible material that shrink when exposed to pressure above atmospheric in said pressure container (42) whereby the liquid products (2, 3) in the storage receptacles (44, 45) are forced out of said storage receptacles through the conduits (46, 47), and that the conduits (46, 47) cooperate with a valve mechanism (48) which is adapted to keep the conduits (46, 47) closed and permit them to be opened for feeding out the liquid products (2, 3) to the dispenser (1). A dispenser as claimed in claim 14, characterized in that the conduits (46, 47) are detachable from the storage receptacles (44, 45), the pressure container (42) and the valve mechanism (48) to facilitate the cleaning thereof. A dispenser as claimed in claim 14, characterized in that the storage receptacles (44, 45) permit opening for removal of the liquid products (2, 3) and discharge nozzles (50) are arranged on the conduits (46, 47) to be forced through the wall material of the storage receptacles (44, 45) and pushed into holders (49) provided on the inner side of said wall material so that the discharge nozzles (50) are fixedly retained in said holders (49) and make a discharge of the liquid products (2, 3) possible via the conduits (46, 47). A dispenser as claimed in claim 16, characterized in that the conduits (46, 47) are arranged so that the discharge nozzles (50) can be mounted on the storage receptacles (44, 45) when the latter are outside the pressure container (44), and that the conduits (46, 47) are arranged so that the storage receptacles (44, 45) can be placed in the pressure container (42) after the conduits (46, 47) have been connected to the storage receptacles via the discharge nozzles (50). A dispenser as claimed in one of claims 14 - 17, characterized in that the valve mechanism (48) comprises one valve for each of the conduits (46 or 47) so that one conduit (46 or 47) at a time can be opened and closed. A dispenser as claimed in one of claims 14 - 18, characterized in that the valve mechanism (48) comprises a clamping means (54) and one hold-up means (55) for each conduit, such that an elastic part of each conduit extends between the clamping means (54) and the hold-up means (55), that the clamping means (54) and the hold-up means (55) are so arranged that the clamping means (54) on one hand is adjustable so as to flatten, in coaction with the hold-up means (55), the elastic part of the conduit in order to close said elastic part and on the other hand is displaceable with respect to the hold-up means (55), such that the conduit (46, 47) can open up by reason of its inherent elasticity, and that the clamping means (54) is displaceable with respect to the hold-up means (55) in such a manner in the direction (A) opposite to the feed-out direction (B) of the liquid products (2, 3) that the flattened area (56) of the conduit (46 and 47, respectively) is displaced in said direction (A) opposite to the feed-out direction (B) of the liquid products (2, 3), whereby the portion of the respective product in the feed-out direction (B) of the liquid products (2, 3) downstream of the flattened area (56) is sucked back in a direction (A) opposite to the feed-out direction (B) and the product dropped outside the mouth (61) of the respective conduit is sucked back into the conduit. A dispenser as claimed in claim 19, characterized in that the hold-up means (55) forms a hold-up surface (57) which is centered with a centre of rotation (58) about which the clamping means (54) is rotatable, and that the clamping means (54) is movable, for opening of the valve mechanism (48), with respect to the hold-up surface (57) in such a manner that the respective conduit can open up.

Inventors: STERN LEIF EINAR, STERN, LEIF EINAR
Applicants: ASEPT INT AB, ASEPT INTERNATIONAL AB
Application year: 1994
Main classification: A47G19
IPC codes: G01F11, A47G19, B65B3, B65B39, B65D83